TY - RPRT TI - Electronic authentication guideline AU - Burr, W E AU - Dodson, D F AU - Newton, E M AU - Perlner, R A AU - Polk, W T AU - Gupta, S AU - Nabbus, E A PY - 2011 PB - National Institute of Standards and Technology CY - Gaithersburg, MD SN - NIST SP 800-63-1 DO - 10.6028/NIST.SP.800-63-1 ER -